Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9c29dcd0ebab9f117498b0826769b2ffd8875e8aaa8319cbdaf927133b53528b' 
  AND token = 'GA9vFz8fxoEfpHnCEhfF0MCOQ2qrg5/rVGCQaibBvTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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