Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e781520db9b2e1ec0049832904f17c4b97eee0a58d91a1287a15951bb2c89fa8' 
  AND token = 'AZX6mYPTSUP94ebRCM+VjICXLzskyVmib1iFE39lGyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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