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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13d41757a9b17eba8870527d616fa1ee3d430c0c11d68678854c8e10afd5442d' 
  AND token = 'e4zPpu7xNY922AP977pou+lOjwTjdqJdGUjJOj3quWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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