Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c7adde77c95faed7d1fc2b0c3c3939c3643eb04b660ef6db70f333b94aaf072' 
  AND token = 'OTTbZN0LQn+6Mph4DfKNJGFA832pdmpRtX/HXDaSzFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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