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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69de25fbacf342e18707d34fb332e9f532b47a43d84ca054f8f6ee2c32828c93' 
  AND token = 'G5T3pMf0tDh1B4wrR2pkX6h4y+D9s4ySdoubKv0B9FA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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