Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e223cffcdbea13e7bc8fad2b9d21d17ff0ebae581d0869ea63130513fd360b2a' 
  AND token = 'HN6bEs74bLFldKcQ6+3UBvF+Ft4wSCAqrbEt9uKNchg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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