Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d2b6b03e7d0524dce62f2a37264985332b8b827cdfc959883db46374ec33ca0' 
  AND token = '7jAkmATOUiaHldISQNbFISym97mdhuc2ifAWryhVkkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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