Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d4eb38538c847e8b5b1d384a12f92b3dfa66d1a0eacc8583c99b1028988aaf3' 
  AND token = 'lfr4TXLm6AJxgX2hNL0sipXe8Td52gaz/hlNYCg80/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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