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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a2289c6ccf2da3f1710cc18d2becac0c9f9c38f52a25ea1fd274a0afeadf054' 
  AND token = 'iLOIehE99AjwYgBfzD+GNubOxZpiztWeXOE2C+SNu64=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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