Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0879e8a0b38a8f81dc8c0ac2ed7560129874b6bcf2ed78f2273ff2176722067f' 
  AND token = 'o2u5fV2OYjMvJbor6mdh/wZZEWHgVY1J5wart/u5mJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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