Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9be7c71389517385b092c3238df3446246bf495bf9df47a684b35d4e60583b3' 
  AND token = '7XaSQUBNEuQw9SaL55+f+UHhaRwMDzex5G3I4Xz2pYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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