Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2d1f5e52a79a287e6ba9ccb52bce3e91ce2f3cafc0b87fa3ca3ea29a27aabbf' 
  AND token = 'lxi/pdLsiHrkKwb8MchDAiIvQ+GMsQCQ3SLFoPStk7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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