Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19512ec0b2f9f770639789598e6f8545e6bfaa6709bf3754eed1cc0b043350d2' 
  AND token = 'wmTCUsGOJiExj7A1LaALrA6TEHN92Q8sVGx6oDGStrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}