Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fa830a5eb73da057ecac0661d0b104bb38e1e112ee766f081f3bfae354161b3' 
  AND token = 'sKW+ax5X9i9Hb3+2fgtC4wUnvNpniQ6ak8VEj2TDGSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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