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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9a65440f33c1dc0c8c40dd782dee11d7b70e1f8dc0a337d53682d7beb6ea8b4e' 
  AND token = 'veMoN8O+2ywd5hKevQR2Bj3RqAws6n2FaiDg4WhOIig=' 
  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"
    }
  }
}