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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '25ffbdfee9c87a96a098fb6a82e919b8f12603906c2e40906a0d49752bcd229e' 
  AND token = '2gCi1GwxElBuud/+oZkTgcajw9UgUZbomdq0riOaoCM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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