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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa1438d04cb6bece2d019e417585acc03e25bfb39c87507fdb88ea6981e1ba6a' 
  AND token = 'yZaC74D4U6nlNT0BIAGcsenexU+Ke/+Dz42A4ZtSY1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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