Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0447ca61af20d5758183e7a5d09321b4abac9413668e2ce2e033d9b089bf6ad5' 
  AND token = '13QRqIOloZp+m3jMMUSMB12bAgpGfjeXXTQVaz2q+zQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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