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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '395422da9d334df4dd150a7b38ece641b7689c8ec8eb0930b7d64ac9e167d0a6' 
  AND token = 'cta38d/awd+KyfNOrZKULtb3BYpZ+/RxVq9a3uaqioM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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