Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b88526337fbb6833b379632db52a2b8fd5febb8bc457945afd94b26e2bb4614' 
  AND token = 'eEhFnkzbD4NcKnaUakq6S/YDjmd1flDapytMYqtF974=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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