Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '342faaefa7794cc7820a8c34c36bc6ab462d93112028102c618cf4c50f92f3d1' 
  AND token = 'eVvQLVIkv88Jz5/cSbIKChd02IO6XMoYVgBbrWid4Vw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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