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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6c4f87f70cba085ba8ddc125f1a9e51594217a5651672b3b792ed12707dc63a5' 
  AND token = 'AQyz41i24s3+9wQFkCb5vWZGi3ZkKlrwEO12GLtzWRI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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