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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2485c69141264c7cd70522c8398d8627347bf477a43c0e4fae2dda5ff93da0c4' 
  AND token = 'Q226DNo9SyrDHwYOeJgYWVBKEVfWoiTFasMw4XpJbtc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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