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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '002a577a50128e1e5ed35b606f2f4ca0003967396ffc535e868fb5c940e84cf3' 
  AND token = 'uKSe2rL/LjfkB70ZVfP5/lmCw29g1v3FleQ6dHViINU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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