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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12aa53f2d59b5d2761c35fb0e8ed6c83cb69a023e9bdeb7e8c7b1cd115ab65fc' 
  AND token = 'reza8Mp3p2xs8fDNNKDEKeIajSqyXZeWjFIKh73J6Ag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}