Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58fab37cc6a1b549ed90a45a93453ebc50bff8461066ad5c5ba46df92284de14' 
  AND token = 'EhuOf5TQScOTcoYcNhOeupLyg7gV7gJgklIDss+dVTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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