Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb7a81227bdd114ff4bb190eab9b57454392d70c6627f98f99bd9800f950bf42' 
  AND token = 'MhJd9d2rouumBajsY1nQVpHXWhnaDopAT1OQ/VtmCmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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