Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd89ee823ddf88816bb2fcd5a269ea21540e4f7ab74c287a962c5f3708fd14a30' 
  AND token = 'SlVzdN2XUkYn1d1j9k4kATzLLMpw/cgKIDxtPJx2Xes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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