Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77e9b1989d9cdbe900c379a90afc94fcdc5cf948287abc7a4510df1205bc8de6' 
  AND token = 'FztelokNG8TieUia5Z91NJAz1Hgzf7crkHfv4Rqm6hY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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