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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36a4c20883042b44365865a1626c71dc7100817f1e112a71e503063c2b3f70c5' 
  AND token = 'w8hZuj8/hk67VZxWpGt8D2yol1tjE7VuxGUu3ycIZPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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