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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd99b34324fc857d7ccc5ff66ea4b55748e90596326a0d2a9a38e72d99d7e849f' 
  AND token = 'mQ7NlwbWQ4CJNT6A66l8nyja0v0kINW+MW24f/SFRRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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