Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c2e3e0c5b976ccc01e7a573332bb0cf8c45d19b7a7dd418c853b3c7a7e49009' 
  AND token = 'nh4D51TQ5C9bzBEtmsffNsWC8ZmiNeH/KeDzJeREmr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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