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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32a2abac211bf3ef8e6f427760db53a6b292309ef294ce70e03a7bdfdf76a83d' 
  AND token = 'YKLwpNx/t+itbDk5r48v5XOL6MQinvSB+om8zFQznIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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