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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '009d02b2f57c446c4cc76e8a6d11dab126a804172e52409e436fae7734c1c652' 
  AND token = 'f6r2i5LJwJwxSDeVlLGHfNdOY//6IoNpzUubPKYanZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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