Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f39cd1b7dd41adcdd0e8226202b852beb8ef93b642a242f1be758a0fe542d585' 
  AND token = 'wvJ6ueHoaHp1A2Uy/ge8AFFtEgBVQu9J3XO2BYkMXCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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