Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bd8568ebf59c0182b5687a7bd2cd51bbe50faf5afbbeab4ef4dcb580ffe97c0' 
  AND token = 'p3AIepiYBMCJUccTSIkCOlSKsDF98bPP4Ttxaj/tsVg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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