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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a555267c0acce6f4dbcdceb9f8aa5a51b53ab7b105ed035a8c5c6737f1a13090' 
  AND token = 'W7desV/JQiH2CogmZTEZ+KcNKeciVrzRUWGn9ODNqJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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