Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '787b57b29ccfeb8f483d53c3c374fc54e48814986839457046c280f883524fea' 
  AND token = 'LZ0JU6VkMWU3NJZrS0zSdu0+PQXc875kmfgaJqPTtQY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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