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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1279275b80ad516f2d1f93ac4696f0ff873a445d96e369e981cf1797c218cade' 
  AND token = 'H+PMB5VIVXUXLnsFcUB2gO+glm2Bu1Wub8Og2WG1Z+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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