Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d85f19a2a10d2526d47babe22ae291c1b1837300811f608dadbfb4035d4c443' 
  AND token = 'iUZWC30/ZAvqsbnAmeu3EVr7ocz85+XmicShK6HgfnM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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