Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be40fe01d1b356e416eff813c4c21551fea08b86ca865c50c3dc9168b400572c' 
  AND token = 'PjBn/GXyPuwRgKeriVK2tleLwJUTlPvs7M4iA/0vkeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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