Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f50beba2c7a6e54d070cd12d01de8c5b6f545f6ab34762fc4fc0909d61c24bf9' 
  AND token = '7vJSr7q51eibeaRN1Xca7gAvVtPezkaYHEfIjBJb+1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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