Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a5ed345c2992029aac9b73e9ea1d0d18981ea7ca42ce5b9da7a9e8771e79cc6' 
  AND token = 'K7xyf3PTUI2TLWsUYUpT1uMRpncOLo5Fhnj7EOYi1W8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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