Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d037362e17a8f754a5e0676faa7d3f6b652568a4d8975708e74876e069aa674' 
  AND token = 'AG5iHclOjNGzdJNk/DlnLAOEFuuq9exXkwXDTwZm2PM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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