Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b1c8a9663266398fca50f78dda795822646d3faa57bb7005e78ecdf14b59b88' 
  AND token = 'Y276cNfu4wDcsuJS5evatEugqkph6LZTjMx9JPRP8XQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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