Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fbc1cb4f0bef62e19b24abbf3cd1122045e790f31ba24fd73314bc1be7c413f' 
  AND token = 'BrdJn22NWVGWpyr+ae1FPnaX/H0DgQZEEwhIENQhjwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}