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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '647f544f3ae46270788fba87a0d0072a41417f9eabab95817f843008b1780a28' 
  AND token = 'xVYpgLWh5V3M6pGbq+B47uE376R3JLAlC7otiMlqFfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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