Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd0a329b7dc00cedf0a18e754a996983adcbc4faa50f48c5931a9f413a4824c0' 
  AND token = 'FpyO0fBoPTKYaaZVJsETHO/JGaYdgYrtLADmL1ohDDo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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