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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25904a7fa239ca98ee32f877e674103726fc2d03b2838d6eec429c1a52a6329d' 
  AND token = 'gTcUF61H0KDHGwe/D/SW3Wd85xP//d2EOs6i60ENaEY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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