Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e12bc4094e8325aad666c80bff02de706ffeb127252733281cf5e1232941e8c3' 
  AND token = '8uLkqTkx2uBeTY1TOOLj73NVt929M0s80/DsGrKLYl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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