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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b333e5788d4c900a3b8c131b8604e5cfcda6b7a4e989beb496e39d8ba7b6df98' 
  AND token = 'opDrU+C8Xvg3RzN2Bgug1budtZgo7O9SOWKMZee5N7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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