Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23b93e2d5cbee161a7eb13dec7fb65893ad74db1cff61834ef5a67a1f9acc33c' 
  AND token = '9/UoA1EqT716YhbIM9dfWd4TMZ1Ci/Ju0hEBEhveqzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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