Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee0e9b0f3b17ef6801decc9011ea1a277e131b68d02ea69a1f8927000a18dd50' 
  AND token = 'he1bAu11XGO9jOLAZ46AbTTIINYRxqUUmi4HyNPPaiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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