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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '3625939d8af5f7072c35b8d354de6f0ea3abab3ec623d86ad36927f75096d70f' 
  AND token = 'ym2PsJ2RBVyzf+3AmMvI3GVvqtLeb7uYPmi6gJNmM2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}