Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b45ce8ac2e77477f6bf0c2848d391473dadb561941c2fc61afcecdb98604f109' 
  AND token = 'PN5Qn1IK1CQDvALRYKqBk93LkfEcqkc8yxUgc2L8ZaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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