Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec7d1dd1a555a902bd7e3c588ea5f34b5dad6e872798d2854ed6781dc7d8de06' 
  AND token = 'Pxkm5wW3fM6f2CyQfo08i7w55HkfPbXuYzuJWfM3ezc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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