Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a7e0ae3108794de24b35cb7e54e07c43aaf9a5ea909e087ec3ca18f3664ab5c' 
  AND token = 'e/LGuEI/H3asH1esZZ2teGdwMB41yylTiJuR/gmuJvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}