Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0312975905ece446d264e851d3fd833c7d25da7dfd6f8a62d2715ddd3bef30ba' 
  AND token = 'q1at5+g44AYPKL3EodZJEA0DryXIHKMy2PfkNGL0eR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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